I use only a trolling motor. Each time I go out I make sure that I charge it when I get back home even though it is still more than say 1/2 fully charged. The question I have is am I doing harm to the battery by not letting it discharge more before charging it back to full? I am on the water for 4 - 6 hrs 3 or 4 times a week and each time I return home I still have 2/3 or 1/2 charge according to the battery meter I have. Thanks for any info.